Stone and ore crushing machine



.3 Sheets-Sheet 1.

(No Model.)

B. H. BOOTH. STONE AND ORE GRUSHING MACHINE.

Patented Aug. 16, 1892.

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(No Model.) 3 Sheets-Sheet 2.

B. H. BOOTH. STONE AND ORE ORUSHING MACHINE.

No. 480,761. Patented Aug. 16, 1892.

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E. H. BOOTH. V STONE AND ORB CRUSHING MACHINE.

No. 480.761. Patnted Aug. 16, 1892.

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UNITED STATES PATENT QQFFICE.

EDGAR HBO-0TH, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE RISDON IRONAND LOOOMOTIVE WORKS, OF CALIFORNIA;

STONE AND ORE CRUSHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 480,761, dated August16, 1892.

Application filed October 21, 1891. Serial No. 409.357. (N0 model.)

To all whom it may concern.-

I Be it known that I, EDGAR H. BOOTH, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements in Stoneand Ore Crushing Machines; and I hereby declare the following to be afulL-clear, and exact description of the same, reference being had tothe accompanying drawings, forming a part of this specification.

The improvements about to be described are specially applicable tothekind of stone and ore crushing machines for which my ap plication forLetters Patent was filed June 20, 1891, bearing Serial No. 396,925;butthey will also be found useful in connection with other machines ofthe kind difiering in some respects from these.

My invention consists in the employment of a wedge adjusted by a boltand placed between the toggle-plate seats in the center of the actuatinglink or pitman, so that by moving the nuts upon the bolt the wedge willforce the toggle-seats farther apart or allow them to come closertogether, and by this means regulate the size of the product of thecrushingj aws or faces. This arrangement enables the adjustment of thejaws to be more quickly made, owing to the wedge tapering on each side,and also materially shortens the machine as comparedwith those havingawedge and wedge-block placed at the back of the machine, also inplacing a cast or wrought iron plate under the head of the bolt, whichsupports and adjusts the wedge in such a manner as to permit the plateto be broken or bent should any undue strain be thrown upon the wedgethrough the toggle-seats by reason of foreign mattersuch asdrill-points, sledges, &c.aocidentally falling between the jaws, andthus prevents serious damage to the machine.

My invention further consists in providing two wrought-iron or steelbolts near the bottom of the machine in the same plane and at a rightangle to the pivot shaft or pin of the moving jaw, which is pivotedbelow its crushing-face for the purpose of taking the crushing strains,which are thus mainly thrown upon wrought iron or steel and notentirelytaken up by massive cast-iron frames, as is usual in machineshaving their moving jaws pivoted below their crushing-face, also byhaving threads out upon these bolts between their ends in the properplace to provide an adjustment for the size of the crushed product bymeans of nuts working upon these threads and bearing uponacross-bar,against which the journal-boxes of the pivot-shaft rest. This adjustmentfor determining the size of the crushed product is more quickly made andaccessible than by the devices hitherto employed for this purpose, suchas placing filling in plates behind the journalboxes.

My invention also consists in anovel manner of transmitting the motionfrom the cocentric-shaft to the lower moving jaw by means of a bent rodor U-bolt, whereby the actuating mechanism of the upper and lower movingjaws are made less dependent upon each other and oblique strainsavoided.

Another object of my invention is to provide an arrangement of springswhereby the 10st motion due to wear in the diiferent journals and movingjoints is taken up, and also to provide suitable springs for bringingthe moving jaws back after each forward crushing movement, also toprovide means for taking up the lost motion in the eccentric bearing ofthe actuating pitman by means of a key or keys and aloose gib-piecebearing against the shaft.

My invention also consists in improvements of the crushing-faces of theremovable shoes and dies for the purpose of insuring longer wear andsecuring a better crushing effect.

Another obj ectof my invention isto increase the strength and stiffnessof the two side frames of the machine without greatly increasing theweight by casting hollow shells or sleeves on the sides of the framesand extending approximately the whole length thereof, and through whichthe side rods or bolts that take the heavy crushing strains pass.

Figure 1 is a longitudinal vertical section through the center of amachine having my improvements. Fig. 2 is a section on the line m w ofFigs. 1 and 4. Fig. 3 is a plan view of the lower jaw. Fig. i is atransverse section on the line y y of Figs. 1 and 8. Fig. 5 is a rearelevation of the sliding cross-bar or abutment of the lower jaw. Fig. 6is a plan on the line a z of Figs. 1 and 4, showing the wedge for thetoggle-plates. Fig. 7 is a longitudinal section showing an invertedposition of the wedge. Fig. Sis a plan view of a complete machine. Fig.9 is a side elevation of the same.

Similar letters of reference on the difierent' figures indicatecorresponding parts.

In notation the following letters are employed to designate theprincipal parts of the machine and of my improvements: AA, side frames;13 0, end frames; D D side bolts; E, upper jaw; F, lowerjaw; F leverforlower jaw; G, breaking plate; H, pivot-pin of lower jaw; I,eccentric-shaft; K, loose gib; L, stationary die; M, pitman; Mpitman-head; N O, toggle-plates; P, hole in lever of lower jaw;Q,toggle-seats; R, U-bolt for pitman; S S, ball-and-socket joint forlower jaw; T, shell or sleeves on sides of main frame; U, adjustingwedgefor toggle-joint V, wedge-bolt for toggle-joint; V nuts on toggle-bolt;W, keys in the top of the pitman; W bolts and nuts for keys; X, guidesin main side frames; Y, frames for shoes and dies; Z, pull-back rods forupper jaw; a, spring for upper pull-back rods; 0, sliding cross-bar forlower jaw; e, springs on pull-back rods for lower jaw; m, lugs on sideframes 1" or springs; 12, pull-back rods for lower jaw; 0, spring-rodsfor ball-and-socket joint; 1, spring for ball-and-socket joint; 0,journalboxes for fulcrum-pin of lower jaw.

The main frame of the machine and its driving-shaft, together with thearrangement of the upper and lower moving-jaws, is substantially thesame as in my aforesaid application for Letters Patent, or may beconstructed in any other approved manner.

To this machine or any other operated on the same general principles Iapply my invention as follows: The pitman M has an opening in itscenter,with ribs running between its sides, within which is placed thewedge U, bearing against the toggle-seats Q Q, which rest on and areguided by the ribs between the sides. The bolt V passes through thecenter of wedge U, with nuts V resting upon its upper surface, the headof bolt V resting upon the plate G, which forms a bridge across the ribsat bottom of pitman M Upon turning the nutsthewedge Uis either forceddown between the toggles N O, forcing them apart and causing the shoe Eto approach the die L, or the reverse if the nuts are turned in theopposite direction. There are two pull-back rods Z and springs aprovided, attached to the lower part of upper jaw E, and taking theirbearing against lugs attached to back frame 0, as shown in Fig. 1. Thesesprings keep the moving parts actuating the upper jaw E in their properposition in the usual manner. The plate G is of wrought or cast iron,made sufficiently strong to hold the wedge U in its proper place forordinary crushing-strains; but will break or bend and allow the wedge torise and the toggle-seats Q Q to approach each other, and thus widen theopening at the bottom of the jaw E should foreign matter not capable ofbeing crushed by an ordinary effort fall between the jaws. The loose gibK is fitted in the upper part of pitman M and held against the bottom ofthe eccentric-shaft I by means of a key W, set up by-a bolt and nuts Wfor the purpose of taking up anylost motion of the shaft in thepitman-head M The bent rod or U-bolt R is curved to conform to thecircle of the pitman-head M The ends thereof pass down on each side ofthe pitman M and engage theball-bearing connection S, which fits intothe socket S cast on the end lever F trio is thus transmitted throughthe lever F to the crushing-face F. A hole P is made in the lever F toallow the passage of the rod on that side. The ball-and-socket joint S Sis self-adjusting, and thus compensates for any inequality in alignmentdue to construction or wear. The spring '1' is held by the rod 0 and,bearing on top of ball-and-socket joint S S acts as a pull-back springfor jaw Fand also takes up any lost motion between the U bolt R and thepitman-head M as well as between the ball-bearing connection S andthenuts on the ends of U-bolt R. The shaft or pivot-pin H, on which the jawF is fulcrumed. is held rigidly in the lower part of the jaw F by meansof the set-screw S. The projecting bearings of the pin I-I rest in thejournalboxes 12 v,whioh may be made to slide back and forth in guides XX, cast on the inside of side frames A A. These boxes 1: v rest againstthe cast-iron cross-bar c, which extends across the machine and throughwhich pass the bolts D These bolts are threaded at the ends and providedwith nuts V so the cross-bar a can be moved forward or allowed to comeback, moving in and held in place by the slides X in the lower part ofside frames A. Said bolts are also threaded near the middle portionsthereof and provided with other nuts thereon,whicl1 operate against thecross-bar c, as shown in Fig. 2. By this adjustment the size of thecrushed product falling from bottom of jaw F is determined and the heavycrushing strains are taken up by the bolts D in tension. These boltspass outside of the boxes 1) and through the end frames B O and holdthem in place, inaddition to taking crushing strains from jaw F.

The rods n, attached to bottom of jaw F and between the bearings 'u, areheld in tension by means of springs e, acting against lugs m, cast onthe side frames. These springs holdtheboxes'ufirmly against theslidingpiece c, and also prevent lost motion of the pin H in the boxes11. As there are two of these springs situated between the boxes '1),should one break the other is capable alone of performing their duty.

Upon the faces of the stationary and movable jaws are fitted removablecrushing-faces E, F, and L. These consist of alternate layers of wroughtiron and steel bars placed on The motion of the eccenedge and heldwithin rectangular wrought iron or steel frames Y. The steel bars arehardened, and the wear being greater upon the wrought-iron bars thanupon the steel, the latter will be slightly elevated above the surfaceof the wrought iron, forming a corrugated surface and giving a bettercrushing effect.

In Figs. 3, 4, and 9 will be seen the hollow iron shell or sleeve T,castupon the side frames A A, and through which pass the bolts D.Thesehollowsleeves add greatlytothe strength and stiifness of the sideframe and give the machine a heavy massive appearance without materiallyincreasing its weight.

It will be understood that the wedge U,bolt V, and connected members canbe inverted in any case when required, as shown in Fig. 7, without inanywise altering their functions or manner of operating.

Having thus explained the nature and ob j ects of my invention and themanner of applying and constructing the same, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination of an abutment, a moving crushing-jaw, a centraloscillating pitman, toggle-jointed plates between the abutment, thepitman, and the crushing-jaw, a wedge fitted Within said pitman betweenthe toggleseats therein, and adjusting means for said wedge,substantially as set forth.

2. In a stone or ore crushing-machine, a breaking or safety plateresting upon the pitman and connected to a wedge within the pitman, soas to receive the strain coming upon the wedge, substantially as and forthe purpose herein described.

3. In a stone or ore crushing-machine, having two movable jaws, bothdriven from the same shaft, a connecting-rod or U-bolt passing over thepitman-head on the shaft and connected to the lower jaw by means of aball-and-socket joint, substantially as and for the purposes hereindescribed.

4. In a stone and ore crushing-machine, the combination, with the movingcrushing-jaw F, pivoted below its crushing-face, of side bolts D passingoutside of the ends of the pivot-shaft or pin H, and the nuts upon thebolts D ,between the end frames B O, for re ceiving the thrust of thepivot shaft-bearings '0 1;, through the sliding bar 0, substantially asand for the purpose herein described.

'5. In a stone or ore crushing-machine, the combination, with the movingcrushing-jaw, pivoted below its crushing-face, with side bolts havingadjusting-nuts, the sliding bar, and pivot shaft-bearings, substantiallyas and for the purposes herein described.

6. In a stone or ore crushing-machine, the combination, with the movingcrushing-jaw F, pivoted below its crushing-face, the ball and-socketjoint S S bolt R, and pitmanhead M of the spring 4", a rod 0, secured atone end to side frames A A of the machine, and at the other bearing uponthe spring so as to be held in tension for the purpose of preventinglost motion between the bolt R and the head M as well as between theballbearing connection and the end of bolt R, all substantially as andfor the purpose herein described.

In testimonywhereofIhavehereunto affixed my signature in the presence oftwo witnesses.

EDGAR H. BOOTH Witnesses:

ALFRED A. ENQUIST, W'ILsoN D. BENT, Jr.

